The Graduale Romanum contains virtually the entire corpus of Gregorian chant used for masses; for chants for the services of the Divine Office (e.g. Matins, Vespers) see the Liber Usualis. The texts of the Propers (Proprium) and Commons (Commune) vary from mass to mass throughout the year; the texts of the Ordinary (Ordinarium, or Kyriale) remain (usually) unchanged.Registered under EFO-22399. No renewal found.